Receiving set



March 11, 1930. M. v. TIMTIMAN RECEIVING-SET Filed July 1, 1921 WITNESS:

ATTORNEY Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE MAMERTO v. TIMTIMAN, OF MANILA, rrriLIrPINE ISLANDS RECEIVING SET Application filed. July 1, 1927. Serial No. 202,969.

ceiving market reports and like broadcast in- 7 formation.

Another object of the invention is the provisionof a device of this character which includes novel means for housing a crystal detector and a catwhisker, so that both will be protected, the protecting means employed permitting of ready access to these instruments.

Another object of the invention is the provision of a device which will closely follow the lines of an ordinary fountain pen, so that the said device may be conveniently carried for use either asa pen, or as a receiving apparatus, or both.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinaftermore fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings: A

Figure 1 is an elevation of the device.

. Figure 2 is a sectional view with the pen point cover removed and the circuit receiving apparatus shown diagrammatically.

' Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the reference character 10 indicates the barrel of a fountain pen which carries a pen point 11 and an ink reservoir 12, the latter being preferably formed of rubber. The pen is of the self-filling type and which actuates a spring bar 14 for compressing the reservoir 12 in the ordinary manner.

thecasing at the end remote from the pen 1 point 11 is a tuning coil 15. This coil is se- .curely held in place and for this purpose one for this purpose there is provided a lever 13,

nut and the nut is a washer 39 so that p of metal.- The spring 41 permits free move of its ends bears against a block 16 which spaces this end of the coil from the adjacent end of the casing. The opposite end of the coil bears against a partition 17 which is removable and is held in place by engagement with the adjacent end of the bar 14.

The casing isprovided with a longitudinal slot 18 and extending into the casing through i one end of this slot is abinding post 19 which carriesafinger 20 to engage the coil 15. This binding post is rigidly held in place: and is adapted for connection with a ground wire 21 and a conductor 22, the latter having connected therein phones 23. A conductor 22 is connected to a binding post 24: which extends through" the other end of the slot and is rigidly held in place. Slidable longitudinally within the slot is a movable member 25 which carries a finger 26 for adjustable contact with the coil 15. The member 25 provides a bind ing post for the conductor wire 27. The end of the casing is provided with an opening 28 which is surrounded by a threaded nipple 29 and secured upon this nipple is a cap 30which forms a compartment 31 for 5 a crystal detector.- This detector includes a crystal 32 which is secured within a crystal holder 33 located within the compartment 31 and this holder is mounted upon a threaded stud 34 which extends through a metallic sleeve 35. This sleeve extends through an opening provided in the end wall of the compartment- 31'and provides a binding sleeve for securing a substantially L-shaped arm 36 to the end of the cap 30. The arm 36 carries a binding post 37 to which is attached the end of the conductor 27 and also attached to this binding post is an aerial conductor 38.

Mountedupon the outer end of the stud 34 is a knob 39 and also threaded upon this stud is a disk-like nut 40. The purpose of this nut is to lock the knob 39upon the end of the stud 34. Threaded uponthe end of the sleeve 35 is a nut 35 and positioned between this inwardmovement of the stud 34 is limited. A spring 41 surrounds the stud and bears against the inner end of the'sleeve 35 against the crystal holder 33, the latter being formed tending through ment of the crystal holder when the knob 39 is manipulated in searching for a sensitive spot. The spring also serves to force the crystal holder inward and the tension of the spring may be regulated by the knob so as to regulate the degree of contact between the crystal and the catwhisker.

Secured upon'the binding post 24 is an arm 42 and secured to this arm is a catwhisker 43 which extends through the opening 28 and engages the crystal 8:2. The crystal and catwhisker will thus be protected from dust and other injurious matter and will further be protected against injury by contact. The cap 30 may be conveniently removed when desired to obtain access to the crystal and the latter may be adjusted to provide diflerent degrees of contact with the catwhisker.

In assembling the device, the binding posts 19 and 24 and the member 25 are first positioned, after which the block 16 is inserted and then the tuning coil is positioned in contact'with the block. The partition 17 is then forced inward against the end of the coil 15 and is tightly wedged in place by contact with the bar 14. The parts which compose the crystal detector in the cap 30 and the cap, are then screwed to the nipple 29. The reservoir 12 of the remaining parts of the pen are then secured in place.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is 1. In a radio receiving apparatus, a tubular casing having an opening at one end, a cap threadedly mounted on said end over said opening and defining a compartment, a metallic crystal holder within the compartment, means to supportthe holder within the compartment, a radially disposed arm secured within the tubular casing and adapted to be connected in the circuit of the apparatus, a catwhisker secured to the arm and extending through the opening of the casing for contact with a crystal within the crystal holder and means to connect the crystal holder in the receiving circuit.

2. In a radio receiving apparatus, a tubular casing having an opening at one end, a cap threadedly mounted on said end over said opening and defining a compartment, a metallic crystal holder within the compartment, means to support the holder within the compartment, an arm secured within the tubular casing and adapted to be connected in the circuit of the apparatus, a rightangularly disposed catwhisker secured to the arm and exthe opening of the casing for contact with a crystal within the crystal holder, means to connect the crystal holder in the receiving circuit and means whereby the crystal holder securing means will also secure the last referred to connecting means in place.

3. In a radio receiving apparatus, a tubular casing having an opening at one end, a cap threadedly mounted on said end over said opening and defining a compartment, a spring influenced metallic crystal holder within the compartment, means to support the holder within the compartment, an arm secured within the tubular casing and adapted to be connected in the circuit of the apparatus, a catwliisker secured to the arm and extending through the opening of the casing for contact with a crystal within the crystal holder, means to connect the crystal holder in the receiving. circuit and means to adjust the position of the crystal holder.

4. In a radio receiving apparatus, a tubular casing having an opening at one end, a cap threadedly mounted on said end over said opening and defining a compartment, a metallic crystal holder within the compartment, a clamping sleeve extending through and secured to one wall of the compartment, a threaded stud extending through said sleeve, aknob mounted upon the stud, a binding nut mounted upon the stud and bearing against the outer end of the sleeve and limiting inward movement of the stud, a spring surrounding the stud and bearing against the crystal holder and the inner end of the sleeve and means mounted upon the sleeve to connect the crystal holder in the receiving circuit.

5.- In a radio receiving apparatus, a tubular casing having an opening at one end, a cap threadedly mounted upon said end over said opening and defining a compartment, a metallic crystal holder within the compartment, a clamping sleeve extending through and secured to one wall of the compartment, a threaded stud extending through said sleeve, a knob mounted upon the stud, a binding nut mounted upon the stud to lock the knob, a washer mounted upon the stud between the binding nut and sleeve to permit free turning movement of the knob, a spring surrounding the stud and bearing against the crystal holder and the inner end of the sleeve and means mounted upon the sleeve to connect the crystal holder in a circuit.

In testimony whereof I ailix my signature.

MAMERTO V. TIMTIMAN. 

